Maxima Function
fundef (f)
Returns the definition of the function f.
The argument may be the name of a macro (defined with ::=),
an ordinary function (defined with := or define),
an array function (defined with := or define,
but enclosing arguments in square brackets [ ]),
a subscripted function, (defined with := or define,
but enclosing some arguments in square brackets and others in parentheses ( ))
one of a family of subscripted functions selected by a particular subscript value,
or a subscripted function defined with a constant subscript.
fundef quotes its argument;
the quote-quote operator '@w' defeats quotation.
fundef (f) returns the definition of f.
In contrast, dispfun (f) creates an intermediate expression label
and assigns the definition to the label.